Unknown growth in tank

[King Wrath]

Hi everyone. A couple days ago I noticed something in my tank I’ve never seen before. They look like a couple of small green marbles. I’ve attached some pics of them. Does anyone know what they are? If so, are they ok, or are they bad? Thanks for the help!

 

[Crabs McJones]

Bubble algae. Pest algae. Emerald crab will keep them at bay.
Welcome to R2R!

 

[tank of gems]

Bubble algae. Emerald crabs. Desjardini sailfin tans and vlamingi tangs. But I syphon them out also. Just dont pop them in the tank or more will occure

 

[King Wrath]

Ok, thank you. I appreciate the help!

 

[krash7172]

Your tank looks mature with coralline in your pics so shouldn't be much of an issue. Bubble algae is kinda cool IMO. Red is actually pretty. You can just pop them and it doesn't make them spread contrary to popular belief. That's the first thing a bubble algae eating critter does. Lol. +1 emerald crabs